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प्रश्न
Explain why, a real image can be projected on a screen but a virtual image cannot.
उत्तर
A real image can be projected on a screen unlike a virtual image because a real image is formed by the actual meeting of light rays. A virtual image, on the other hand, is not formed by the actual meeting of light rays.
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संबंधित प्रश्न
What is the nature of a mirror having a focal length of, +10 cm?
What type of mirror should be used as a shop security mirror?
Why can you not use a concave mirror as a rear-view mirror in vehicles?
Whatever be the position of the object, the image formed by a mirror is virtual, erect and smaller than the object. The mirror then must be:
(a) plane
(b) concave
(c) convex
(d) either concave or convex
What is the effect on the size and position of the image of moving the object (i) towards the lens, and (ii) away from the lens?
Light travels in the same straight line path while passing through different media.
Write true or false
The focal length of a convex mirror is equal to its radius of curvature.
State whether true or false. If false, correct the statement.
The convex mirror always produces a virtual, diminished and erect image of the object.
The most common example of a convex mirror is the make – up mirror.
Match the following.
| Column I | Column II |
| Convex mirror | Radio telescopes |
| Parabolic mirror | Rear-view mirror |
| Snell’s law | Kaleidoscope |
| Dispersion of light | sin i/sin r =μ |
| Refractive index | Rainbow |
